Sheet-feeding device.



E. KOBRNER.

SHEET FBEDING DEVICE.

APPLIGATION FILED JULY 16, 1913.

1,072,397. Patented Sept. 2, 1913.

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EWALD KOERNER, 0F DRESDEN, GERIIIANY.

SHEET-FEEDING DEVICE.

retener;

Specification of Letters Patent.

Patented Sept. 2, 19113.

Griginal application led .Tune 15, 1912, Serial No. 703,871. Divided and this application filed July 16I 1913. Serial No. 779,320.

To all whom it may concern Be it known that I, Ewam) KonnNnn, a subject ot the Emperor ot Germany, residing at Dresden, Germany, have invented new and useful Improvements in Sheet- Feeding Devices, oit which the following is a specilication.

The present invention, which is a division of my copending application Serial 703,871, tiled June 15, 1912, relates to a device t'or teeding sheets oi paper 'from the bottom of a pile, and includes the provision of a iframe which is so arranged under the paper pile that it can be reciproeated 'from one end to the other of the same. Mounted in bearings carried by said 'traine are two rollers which alternately support the paper pile by means oi flexible bands each having one end connected to one of the rollers and the other end to a stationary element, the ar- 'angement being sueh that one rolle' as it passes beneath the pile ot' sheets is rotated by said pile when the trame is reciprocated in one direction and winds a. bland around its circumference while the other roller unrolls its band previously wound thereon. The rollers are each fitted with suction nozzles or mouths by means of which they snccessively pick a sheet from alternate ends of the pile and discharge it between rollers.

In the accompanying drawings illustrating the preferred form of the invention; Figure 1 is a vertical sectional view ot the invention showing the parts in one extreme position. Fig. 2 is a similar View showing the same parts in the other extreme position, and Fig. 3 is a plan View.

In the drawing, a frame 1 is arranged to reciprocate to and fro in a guide-way 13 under a pile of sheets 12, supported alternately by rollers 3 and t mounted to oscillate in bearings connected to the traine 1 and .which roll against the under-surface of the pile when the :trame is reciprocated. Fastened to the roller 3 is one end ot' a flexible band 5, the other end of which is connected to a stationary element 7, the arrangement being such that as the iframe 1 reciprocates, the roller 3, bearing against the under side of the pile 12, is rotated and the band 5 wound thereon when the trame is moved in one direction, and unrolled beneath the pile to form a support therefor, as shown in Fig. 2, when the frame moves in the opposite direction. A second band (i is connected in the same manner to the roller et and is also 'fastened to a stationary element 8. lVhen one band is wound upon its roller, the other band is unrolled tor supporting the pile, the position heilig reversed for each movement ot the trame 1.

Each roller is provided with a suction device comprising a plurality ot suction mouths or nozzles 11 opening through the periphery ot the roller in a longitudinal row just along the fastened edge o1 the band. These mouths or nozzles 11 in the rollers eommunimite through the body ot' each roller with its hollow shaft t), said shafts being connected by flexible pipes 141: with any appropriate suction means, not shown, by .which a vacuum or partial vacuum is created in the suction devices.

The parts are so arranged that when the trame l is in one extreme position as in Fig. 1, the band 5 will be wound around the roller 3 and the latter be beyond the pile 12. rl`he band (i, however, supports the pile ot wrappers and the suction nozzles 11 of the roller 1- abut against the lett end oit the paper pile 12 so as to suck that end oit' the lower-most sheet against the roller. As the .traine 1 travels to the right, the weight ot' the pile 12 on the roller turns said roller in the direction oi the arrow to wind the band (i thereon and carry the sheet with it, removing said sheet from the bottom oi' the pile and feeding it between the rollers, the suction being interrupted at the right moment and the sheet discharged. This saine movement of the -frame 1 unwinds the band 5 from the roller 3 and carries the band 5 under the pile 12 to support it when the band (3 has been wholly wound on the roller 4 and passed from beneath the pile 12, as in Fig. 2. The suction mouths or nozzles 11 ot roller 3 are now immediately below the right end oit the pile 12 and suck that end of the lowerniost sheet against the mouths. The frame 1 being now moved to the leilt the band 5 is wound on roller 3 and band G unwound from roller 4l, the roller 3 drawing the bottom sheet of the pile from the pile and delivering it between the rollers as before. It will thus be evident that a sheet will be delivered at each reeiprocation ot' the trame 1, being picked from alternate ends of the pile and carried between the rollers. A bracket or abutment 10 is provided for the edges of the sheets to hold them in place.

What I claim is l. In a device for feeding single sheets from a pile of sheets, means for supporting said pile of sheets and adapted to reciprocate beneath the same and successively pick single sheets from the bottom and alternate ends thereof.

2. In a device for feeding single sheets from a pile of sheets, means for supporting said pile of sheets and adapted to reciprocate beneath the same, and pneumatic means movable With the reciprocating supporting means for successively picking single sheets from the bottom and alternate ends of said aile. l 3.,In a device for feeding single sheets from a pile of sheets, means for supporting said pile of sheets and kadapted to reciprocate beneath the same, and alternately operated suction means movable With said reciprocating supporting means for successively picking single sheets from the bottom and alternate ends of said pile.

it. In a device for feeding single sheets from a pile of sheets, means for supporting said pile of sheets and adapted to reciprocate beneath the same, a pneumatic suction means movable Wit-h the reciprocating supporting means for picking a sheet from the bottom of said pile at one end when traveling in one direction, and a second pneumatic suction means for picking the succes` sive sheet from the bottom of the pile at the other end When traveling in the opposite direction.

5. In a device for feeding single sheets from the bottom of a pile of sheets, a reciprocating frame, a pair of rollers rotatably mounted in said frame, each roller having a peripheral suction mouth, tWo flexible bands each fastened at one end to a roller adjacent the suction mouth thereof, and at their other oppositely extending ends to a stationary element, each of said bands being alternately Wound upon and unwound from its attached roller as the frame reciprocates to successively support on the unrolled band or portions thereof the pile of sheets.

6. In a device for feeding single sheets from a pile of sheets, a reciprocating frame, a pair of rollers mounted thereon to oscillate as said frame moves to and fro beneath a pile of sheets, a suction means having a mouth opening through the periphery of each roller to successively pick single sheets from the bottom of said pile and from alternate ends thereof, and a flexible band attached to each roller adjacent the suction mouth and to stationary elements said bands alternately Winding upon and unWinding from said rollers as the frame reciprocates.

7. In a device for feeding single sheets from a pile of sheets, a reciprocating frame, a pair of rollers mounted thereon to osciln late as said frame moves to and fro beneath a pile of sheets, tvvo flexible bands for supporting said pile of sheets, each attached at one end to a stationary element and extending toward each other and fastened by their other ends to the respective rollers to be Wound thereon and unWound therefrom as the frame reciprocates, and a suction means having a mouth opening 4through the periphery of each roller to successively pick single sheets from the bottom of said pile and from alternate ends thereof and deliver them between said rollers. Y

In testimony whereof I have hereunto set my hand in presence of tWo subscribing Witnesses. Y

EWALD KOERNER. 1Witnesses:

PAUL ARRAS, CLRE SIMON.

Copies of this patent may be obtained for ve cents each, 'by addressing the Commissioner of Patents. Washington, ID. C. 

